Researchers at the University of Delhi gave golden langurs keyboards connected wirelessly to a computer. To their surprise they watched the monkeys used the devices to type. The letters appeared to be mere gibberish until they ran a transcript through a decryption device used by the Indian military. To their shock they realized the langurs were communicating in an advanced code.
An example:
Dsulo Irro
The monkeys said their favorite game was “ods srro sror”.
https://antiwave.com/wp-content/uploads/flippa20in20pool3x5-e1477450145561.jpg